When you create an iOS application with Xcode, the following two files play the primary role in the application development. AppDelegate.swift and ViewController.swift ( In Objective-C project the file are AppDelegate.h, AppDelegate.m, ViewController.h and ViewController.m). No matter swift or objective-c, the concept is the same. AppDelegate is the application delegate object. It inherits the UIResponder class and … Continue reading iOS Application Life Cycle Example